Light source unit for use in a backlight module

Abstract

A light source unit for use in a backlight module includes a circuit substrate board and a plurality of chip assemblies arranged along a first direction of the circuit substrate board. Each of the chip assemblies includes a red LED chip, a blue LED chip, and a green LED chip. By employing a chip on board (COB) concept, and by providing LED chips of three primary colors directly on the circuit substrate board, chip spacing can be considerably reduced to effectively shorten the light mixing distance so as to permit miniaturization of the backlight module incorporating the light source unit.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority of Taiwanese Application No. 095143374, filed on Nov. 23, 2006.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a light source unit for use in a backlight module, more particularly to a light source unit capable of shortening a light mixing distance to permit miniaturization of a backlight module incorporating the same.[0004]2. Description of the Related Art[0005]With the continuous trend toward miniaturization of liquid crystal display modules, backlight modules that provide planar light sources for liquid crystal display modules need to be improved in order to conform to the current trend.[0006]Due to color rendering performance and environmental concerns, conventional backlight modules that employ cold cathode fluorescent lamps (CCFL) have been gradually replaced by light emitting diodes (LED) that have better color rendering properties and that do not contain merc...

AI Technical Summary

Benefits of technology

[0014]Therefore, an object of the present invention is to provide a light source unit for use in a backlight module, which permits miniaturization of the backlight module by shortening a light mixing distance.

[0015]Another object of the present invention is to provide a light source unit for use in a backlight module, which can guide light in a predetermined direction.

[0016]A further object of the present invention is to provide a light source unit for use in a backlight module, which can improve light mixing effects.

Problems solved by technology

Further shortening of the chip spacing or distance (d2) may not be feasible due to the fixed size of the package base 124.

As a result, the light mixing distance (d1) cannot be reduced, which in turn renders shortening of the distance between the light entering side 112 of the light guide plate 11 and the light source unit 12 difficult.

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